[Xen-changelog] [xen-unstable] tools: hvmloader: select BIOS through xenstore.

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxx>
# Date 1302613249 -3600
# Node ID dbb5ad1c51bd91a95d07bb896c416bcaab9e4455
# Parent  2869bb8995e2ae13b2aff5461f6b361c02df0643
tools: hvmloader: select BIOS through xenstore.

Allow the toolstack to select the BIOS to use via a xenstore key.

Defaults to "rombios" for compatibility with toolstacks which do not
write the key (e.g. xend).

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Signed-off-by: Keir Fraser <keir@xxxxxxx>
---


diff -r 2869bb8995e2 -r dbb5ad1c51bd tools/firmware/hvmloader/hvmloader.c
--- a/tools/firmware/hvmloader/hvmloader.c      Tue Apr 12 13:47:16 2011 +0100
+++ b/tools/firmware/hvmloader/hvmloader.c      Tue Apr 12 14:00:49 2011 +0100
@@ -337,10 +337,30 @@
     cmos_outb(0x35, (uint8_t)( alt_mem >> 8));
 }
 
+struct bios_info {
+    const char *key;
+    const struct bios_config *bios;
+} bios_configs[] = {
+    { "rombios", &rombios_config, },
+    { NULL, NULL }
+};
 
 static const struct bios_config *detect_bios(void)
 {
-    return &rombios_config;
+    const struct bios_info *b;
+    const char *bios;
+
+    bios = xenstore_read("hvmloader/bios");
+    if ( !bios )
+        bios = "rombios";
+
+    for ( b = &bios_configs[0]; b->key != NULL; b++ )
+        if ( !strcmp(bios, b->key) )
+            return b->bios;
+
+    printf("Unknown BIOS %s, no ROM image found\n", bios);
+    BUG();
+    return NULL;
 }
 
 int main(void)

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